tan平方60°+4sin30°cos45°
=(√3)²+4×1/2×√2/2
=3+√2
sin30°/（1+cos30°）+1/tan30°
=1/2÷(1+√3/2)+1/(√3/3)
=1/(2+√3)+√3
=2-√3+√3
=2